Questions & Answers about Kelnerka podaje nam zupę dnia i wodę.
Kelnerka means waitress, while kelner means waiter. The sentence specifically uses the feminine noun, so it tells you the server is female.
This noun ends in -ka, which is a very common feminine ending in Polish:
- kelner = waiter
- kelnerka = waitress
Podaje is the 3rd person singular present tense of podawać.
Here it means something like:
- serves
- is serving
- literally sometimes gives/handing over, depending on context
So Kelnerka podaje nam zupę dnia i wodę means the waitress serves us the soup of the day and water.
Polish present tense often covers both English simple present and present continuous:
- podaje = serves / is serving